Amp Help!

Ok, so I have a Fender Princeton 65, and when I turn it up I get this annoying vibrating sound that messes up the sound of my guitar. You guys think I could open it up and fix this myself, is it busted and am I gonna have to replace it, or could I take it and get it fixed? Thanks guys.

are you sure it`s not just resonating through the floor and walls? try putting a stack of books under it to raise it off the floor, if that stops the vibration you can buy some special mats that will isolate the cab from the floor (their name/brand escapes me atm).

it should float loosely but not be rattling round, it could be something in the amp that`s not secured properly but don`t open up a amp if you don`t know what you are doing as even with the amp disconnected from the mains supply there is still a risk of electrocution from stored charge in capacitors....take it to a tech...